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JunosE 11.2.x Physical Layer Configuration Guide
path ds3 t1 remote-loopback
Testing Connectivity
146
Use to place a remote device, connected at the T1 over T3 layer, in loopback.
Specify one of the following options:
line fdl ansi—Sends a repeating 16-bit ESF data link code word (00001110 11111111)
to the remote end requesting that it enter into a network line loopback. Specify the
ansi keyword to enable the remote line FDL ANSI bit loopback on the T1 line, according
to the ANSI T1.403 specification.
line fdl bellcore—Sends a repeating 16-bit ESF data link code word (00010010
11111111) to the remote end requesting that it enter into a network line loopback. Specify
the bellcore keyword to enable the remote line FDL Bellcore bit loopback on the T1
line, according to the Bellcore TR-TSY-000312 specification.
payload [ fdl ] [ ansi ]—Sends a repeating 16-bit ESF data link code word (00010100
11111111) to the remote end requesting that it enter into a network payload loopback.
Enables the remote payload FDL ANSI bit loopback on the T1 line. You can specify
fdl or ansi.
Example
host1(config-controll)#path 12 ds3 2 t1 14 loopback remote payload
Use the no version to send the 16-bit ESF data link code word to deactivate the loopback
at the remote end, depending on the last activate request sent to the remote end.
See path ds3 t1 loopback.
Use to enable the router to accept remote loopback requests from a remote device
connected at the T1 over T3 layer.
Example
host1(config-controll)#path 12 ds3 2 t1 14 remote-loopback
Use the no version to restore the default, which is to reject remote loopback requests.
See path ds3 t1 remote-loopback.
Use the path overhead j1 command to check for connectivity between the router and a
SONET/SDH device at the other end of the line. This command defines:
A message that the router sends from the specified interface to the SONET/SDH device
at the other end of the line.
A message that the router expects to receive on the specified interface from the
SONET/SDH device at the other end of the line.
When you define a message that the interface sends, you must monitor receipt of that
message at the remote end.
Copyright © 2010, Juniper Networks, Inc.
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